Create CalculatorAWT.java

Calculator Program using java AWT.

Author: ibadlaskar

CalculatorAWT.java

@@ -0,0 +1,266 @@
+import java.awt.*;  
+import java.awt.event.*;  
+class MyCalc extends WindowAdapter implements ActionListener{ 
+  Frame f; 
+Label l1;
+Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0;
+Button badd,bsub,bmult,bdiv,bmod,bcalc,bclr,bpts,bneg,bback;
+double xd;
+double num1,num2,check;
+
+MyCalc(){  
+  f= new Frame("MY CALCULATOR");
+// INSTANTIATING COMPONENETS 
+l1=new Label(); 
+l1.setBackground(Color.LIGHT_GRAY);
+l1.setBounds(50,50,260,60);
+
+
+b1=new Button("1");
+  b1.setBounds(50,340,50,50);
+b2=new Button("2");
+  b2.setBounds(120,340,50,50);
+b3=new Button("3");
+  b3.setBounds(190,340,50,50);
+b4=new Button("4");
+  b4.setBounds(50,270,50,50);
+b5=new Button("5");
+  b5.setBounds(120,270,50,50); 
+b6=new Button("6");
+  b6.setBounds(190,270,50,50);
+b7=new Button("7");
+  b7.setBounds(50,200,50,50);
+b8=new Button("8");
+  b8.setBounds(120,200,50,50);
+b9=new Button("9");
+  b9.setBounds(190,200,50,50);
+b0=new Button("0");
+  b0.setBounds(120,410,50,50);
+bneg=new Button("+/-");
+  bneg.setBounds(50,410,50,50);
+bpts=new Button(".");
+  bpts.setBounds(190,410,50,50);
+bback=new Button("back");
+ bback.setBounds(120,130,50,50);
+
+badd=new Button("+");
+  badd.setBounds(260,340,50,50);
+bsub=new Button("-");
+  bsub.setBounds(260,270,50,50);
+bmult=new Button("*");
+  bmult.setBounds(260,200,50,50);
+bdiv=new Button("/");
+  bdiv.setBounds(260,130,50,50);
+bmod=new Button("%");
+  bmod.setBounds(190,130,50,50);
+bcalc=new Button("=");
+  bcalc.setBounds(245,410,65,50);
+bclr=new Button("CE"); 
+  bclr.setBounds(50,130,65,50);
+
+
+b1.addActionListener(this); 
+b2.addActionListener(this);  
+b3.addActionListener(this);  
+b4.addActionListener(this);  
+b5.addActionListener(this); 
+b6.addActionListener(this); 
+b7.addActionListener(this); 
+b8.addActionListener(this); 
+b9.addActionListener(this);  
+b0.addActionListener(this);
+
+bpts.addActionListener(this);  
+bneg.addActionListener(this);
+bback.addActionListener(this); 
+
+badd.addActionListener(this);
+bsub.addActionListener(this);
+bmult.addActionListener(this);
+bdiv.addActionListener(this);
+bmod.addActionListener(this);
+bcalc.addActionListener(this);
+bclr.addActionListener(this); 
+
+f.addWindowListener(this);
+//ADDING TO FRAME   
+f.add(l1);  
+f.add(b1); f.add(b2); f.add(b3); f.add(b4); f.add(b5);f.add(b6); f.add(b7); f.add(b8);f.add(b9);f.add(b0);
+
+f.add(badd); f.add(bsub); f.add(bmod); f.add(bmult); f.add(bdiv); f.add(bmod);f.add(bcalc);
+
+f.add(bclr); f.add(bpts);f.add(bneg); f.add(bback);
+
+f.setSize(360,500);  
+f.setLayout(null);  
+f.setVisible(true);  
+} 
+                     //FOR CLOSING THE WINDOW
+public void windowClosing(WindowEvent e) {
+  f.dispose();
+}
+
+public void actionPerformed(ActionEvent e){ 
+  String z,zt;
+                        //NUMBER BUTTON 
+if(e.getSource()==b1){
+ zt=l1.getText();
+  z=zt+"1";
+  l1.setText(z);
+}
+if(e.getSource()==b2){
+zt=l1.getText();
+z=zt+"2";
+l1.setText(z);
+}
+if(e.getSource()==b3){
+  zt=l1.getText();
+  z=zt+"3";
+  l1.setText(z);
+}
+if(e.getSource()==b4){
+  zt=l1.getText();
+  z=zt+"4";
+  l1.setText(z);
+}
+if(e.getSource()==b5){
+  zt=l1.getText();
+  z=zt+"5";
+  l1.setText(z);
+}
+if(e.getSource()==b6){
+  zt=l1.getText();
+  z=zt+"6";
+  l1.setText(z);
+}
+if(e.getSource()==b7){
+  zt=l1.getText();
+  z=zt+"7";
+  l1.setText(z);
+}
+if(e.getSource()==b8){
+  zt=l1.getText();
+  z=zt+"8";
+  l1.setText(z);
+}
+if(e.getSource()==b9){
+  zt=l1.getText();
+  z=zt+"9";
+  l1.setText(z);
+}
+if(e.getSource()==b0){
+  zt=l1.getText();
+  z=zt+"0";
+  l1.setText(z);
+}
+
+if(e.getSource()==bpts){  //ADD DECIMAL PTS
+  zt=l1.getText();
+  z=zt+".";
+  l1.setText(z);
+}
+if(e.getSource()==bneg){ //FOR NEGATIVE
+  zt=l1.getText();
+  z="-"+zt;
+  l1.setText(z);
+}
+
+if(e.getSource()==bback){  // FOR  BACKSPACE
+  zt=l1.getText();
+  try{
+    z=zt.substring(0, zt.length()-1);
+    }catch(StringIndexOutOfBoundsException f){return;}
+  l1.setText(z);
+}
+                //AIRTHMETIC BUTTON
+if(e.getSource()==badd){                     //FOR ADDITION
+  try{
+    num1=Double.parseDouble(l1.getText());
+    }catch(NumberFormatException f){
+      l1.setText("Invalid Format");
+      return;
+    }
+  z="";
+  l1.setText(z);
+  check=1;
+}
+if(e.getSource()==bsub){                    //FOR SUBTRACTION
+  try{
+    num1=Double.parseDouble(l1.getText());
+    }catch(NumberFormatException f){
+      l1.setText("Invalid Format");
+      return;
+    }
+  z="";
+  l1.setText(z);
+  check=2;
+}
+if(e.getSource()==bmult){                   //FOR MULTIPLICATION
+  try{
+    num1=Double.parseDouble(l1.getText());
+    }catch(NumberFormatException f){
+      l1.setText("Invalid Format");
+      return;
+    }
+  z="";
+  l1.setText(z);
+  check=3;
+}
+if(e.getSource()==bdiv){                   //FOR DIVISION
+  try{
+    num1=Double.parseDouble(l1.getText());
+    }catch(NumberFormatException f){
+      l1.setText("Invalid Format");
+      return;
+    }
+  z="";
+  l1.setText(z);
+  check=4;
+}
+if(e.getSource()==bmod){                  //FOR MOD/REMAINDER
+  try{
+    num1=Double.parseDouble(l1.getText());
+    }catch(NumberFormatException f){
+      l1.setText("Invalid Format");
+      return;
+    }
+  z="";
+  l1.setText(z);
+  check=5;
+}
+                         //RESULT BUTTON
+if(e.getSource()==bcalc){          
+  try{
+    num2=Double.parseDouble(l1.getText());
+    }catch(Exception f){
+      l1.setText("ENTER NUMBER FIRST ");
+      return;
+    }
+  if(check==1)
+    xd =num1+num2;
+  if(check==2)
+    xd =num1-num2;
+  if(check==3)
+    xd =num1*num2;
+  if(check==4)
+    xd =num1/num2; 
+  if(check==5)
+    xd =num1%num2;    
+  l1.setText(String.valueOf(xd));
+}
+                        //FOR CLEARING THE LABEL and Memory
+if(e.getSource()==bclr){
+  num1=0;
+  num2=0;
+  check=0;
+  xd=0;
+   z="";
+   l1.setText(z);
+   } 
+
+}  
+//MAIN METHOD where objects of MyCalc is instantaiated
+ public static void main(String args[]){  
+       new MyCalc();  
+   }
+}